twin webers??

[Mr-G]

can you get twin weber kits for the 1.2 SPI nova engines??

[SRlew]

you'll get them to fit, you just need the right manifold like! somone will have done it on here or know what to do more than me though!

[Stuart]

you can fit weber T40's to a 1.2spi engine.
the bad way:
keep the engine as it is and get a 1.4carb engine inlet manifold for the 40's to bolt to. fit to engine and have RR'd for fuelling.
the better way:
fit a 1.2 carb head, get a 1.3 inlet manifold for T40's to bolt to (oh and fit an exhaust thats not got a CAT in it), RR setup etc.
the even better way
fit a 1.2 carb head, get a 1.3 inlet manifold for T40's to bolt to, fit a 1.2 carb/1.4carb ignition setup (coil, dizzy,module), then have it RR'd
there are better ways than that but for now you can work out what you want.
Also bear in mind that come MOT time it might be tricky to get it to pass emissions due to them expecting a CAT there..

[Mr-G]

Is the 1.2 carb head different to the 1.2 injection head then ??????

[Stuart]

erm yes... if it was the same, why would i suggest to change to it? lol

[Mike]

OR for even more power, and better future tunning potential, fit a 14 or 1600 8 valve engine, then add T40's to that :thumb:

Well, aswell as a cam, some good head work, manifold, system etc etc

[meritlover]

or for even MORE power sell it and get a bigger car :lol:

[meritlover]

erm yes... if it was the same, why would i suggest to change to it? lol
and what differences would i expect to find when comparing an SPFI head to a carb head?

[burgo]

and what differences would i expect to find when comparing an SPFI head to a carb head?ports a completely the different shapes

[meritlover]

is there any difference in the comp ratio?

[meritlover]

why did they change the disign of the ports for the SPFI head?

[Stuart]

because GM are tossers.

[Adam]

Afaik, port shapes were changed for economy etc on the SPI engines.
Increased gas flow i think has something to do with it.
And the 1400Sr head sharing the same ports, which is why the 1400sr cam is the most agressive in the GM range, to make up for poor ports.

[Mr-G]

Ah bugger that means i am going to have to hunt down a 1200 carb head then

[Adam]

Or, could look into a c14se/e16se head(MPI)
Not sure about compression etc, but that would be the best head to use.

[Mr-G]

will that fit ok onto the 1200 block though???

[Adam]

Cant see why not yeah.

[Mr-G]

hmmm dunno if bore size will be a problem with the head gasket and greating hotspots though

[Stuart]

the 1600 head would fit fine, it would need a skim to set the CR right though

you'd use a 1200 headgasket.

have you checked about mot's lol

[Adam]

I'd deffo go for a MPI head.
But as stu said, a c12nz in a j/k-plate nova is not going pass emissions with 40s fitted..

[Mr-G]

would it have a better chance of passing if i left the cat in place though ?

[stv-b16a]

yes it would. and then remove it again after mot. dont tell anyone i told you tho. lol

[Mr-G]

Well thats what i was thinking, if i get longlife to make me an exhaust with a removable de-cat pipe then when it comes to MOT time i can just bolt the cat back in and hope for the best lmao.

[Welsh Dan]

Until they notice a cat with carbs :tard:.

[Mr-G]

Until they notice a cat with carbs :tard:.

well as long as it passes the emissions test i cant see them having a problem

[nyabinghi]

Afaik, port shapes were changed for economy etc on the SPI engines.
Increased gas flow i think has something to do with it.
And the 1400Sr head sharing the same ports, which is why the 1400sr cam is the most agressive in the GM range, to make up for poor ports.

if I fit a 1400sr cam on my e16se i will have more power??
What is the engine code of the 1400sr ? because in france we don't have the same name for car.

[Welsh Dan]

C14NV for the carbed one I think, if not then maybe C14NZ.

[Mr-G]

C14NV for the carbed one I think, if not then maybe C14NZ.

yeh thats right the C14NZ is the single point injection SRI version

[nyabinghi]

yeh thats right the C14NZ is the single point injection SRI version

the good cam is on the c14nz or the c14nv ?? I will have more power if I put it on my e16se?

[Stuart]

in short no.

[Adam]

Lol, t40s will kill a CAT in no time.

The best cam is 14nv, but its not worth the hassel of fitting one to a e16se.

[Mr-G]

I have had a change of plan now. I am going to use a 1.4 SR carb on a 1200 head with some kind of lairy cam and see how i do with that

[Stuart]

erm...

id go with a 1.3 sr carb+ inlet on a 1.2 carb head. and a moderate but not mega lairy cam...